<template>
  <el-container class="main-container">
    <!-- 头部区域 -->
    <el-header>
      <!-- 左侧的 logo -->
      <img src="../../assets/images/logo.png" alt="" />
      <!-- 右侧的菜单 -->
      <el-menu
        class="el-menu-top"
        mode="horizontal"
        background-color="#23262E"
        text-color="#fff"
        active-text-color="#409EFF"
      >
        <el-submenu index="1">
          <template slot="title">
            <!-- 头像 -->
            <img v-if="userInfo.user_pic" :src="userInfo.user_pic" alt="" class="avatar" />
            <img v-else src="../../assets/logo.png" alt="" class="avatar" />
            <span>个人中心</span>
          </template>
          <el-menu-item index="1-1"><i class="el-icon-s-operation"></i>基本资料</el-menu-item>
          <el-menu-item index="1-2"><i class="el-icon-camera"></i>更换头像</el-menu-item>
          <el-menu-item index="1-3"><i class="el-icon-key"></i>重置密码</el-menu-item>
        </el-submenu>
        <el-menu-item @click="logout" index="2"><i class="el-icon-switch-button"></i>退出</el-menu-item>
      </el-menu>
    </el-header>
    <el-container>
      <!-- 侧边栏区域 -->
      <!-- 左侧边栏区域 -->
      <el-aside width="200px">
        <div class="user-box">
          <img v-if="userInfo.user_pic" :src="userInfo.user_pic" alt="" />
          <img v-else src="../../assets/logo.png" alt="" />
          <span>欢迎 {{ userInfo.nickname || userInfo.username }}</span>
        </div>
        <!-- default-active: 默认激活的菜单项 -->
        <!-- active-text-color: 激活时的文字颜色 -->
        <el-menu
          router
          :default-active="$route.path"
          background-color="#23262E"
          text-color="#fff"
          active-text-color="#409EFF">
          <!-- 之前用的 v-for 循环创建的都是一样的标签, 但现在需要循环创建的标签有两种类型
              有:1:el-menu-item  2:el-submenu -->
          <!-- template 在这里是虚拟标签的作用, 起到包裹多个标签 -->
          <!-- 子菜单的 index: 菜单的唯一标识 -->
          <template v-for="item in menuList">
            <el-menu-item v-if="!item.children" :key="item.indexPath" :index="item.indexPath">
              <i :class="item.icon"></i>
              <span slot="title">{{ item.title }}</span>
            </el-menu-item>
            <el-submenu v-else :key="item.indexPath" :index="item.indexPath">
              <!-- slot="title" 具名插槽老语法=== v-slot:title  也  === #title  作用一样 -->
              <template #title>
                <i :class="item.icon"></i>
                <span>{{ item.title }}</span>
              </template>
                <el-menu-item v-for="sub in item.children" :key="sub.indexPath" :index="sub.indexPath">
                  <i :class="sub.icon"></i>
                  {{ sub.title }}
                </el-menu-item>
            </el-submenu>
          </template>
        </el-menu>
      </el-aside>
      <el-container>
        <!-- 页面主体区域 -->
        <el-main>
          <router-view></router-view>
        </el-main>
        <!-- 底部 footer 区域 -->
        <el-footer>© www.itheima.com - 黑马程序员</el-footer>
      </el-container>
    </el-container>
  </el-container>
</template>

<script>
// 按需导入
import { mapState } from 'vuex'

export default {
  name: 'Main',
  data() {
    return {
      menuList: []
    }
  },
  methods: {
    logout() {
      this.$confirm('此操作将退出登录, 是否继续?', '提示', {
        type: 'warning'
      }).then(() => {
        this.$store.commit('user/updateToken', '')
        this.$message.success('退出成功')
        // 跳转到登录页
        this.$router.push('/login')
      }).catch(e => e)
    },
    async getMenus() {
      // 发请求获取所有菜单数据
      const { data: res } = await this.$http.get('/my/menus')
      this.menuList = res.data
    }
  },
  created() {
    this.$store.dispatch('user/getUserInfo')
    this.getMenus()
  },
  computed: {
    ...mapState('user', ['userInfo', 'token'])
  }
}
</script>

<style lang="less" scoped>
.main-container {
  height: 100%;
  .el-header,
  .el-aside {
    background-color: #23262e;
  }
  .el-header {
    padding: 0;
    display: flex;
    justify-content: space-between;
  }
  .el-main {
    overflow-y: scroll;
    height: 0;
    background-color: #F2F2F2;
  }
  .el-footer {
    background-color: #eee;
    font-size: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
  }
}

.avatar {
  border-radius: 50%;
  width: 35px;
  height: 35px;
  background-color: #fff;
  margin-right: 10px;
  object-fit: cover;
}

// 左侧边栏用户信息区域
.user-box {
  height: 70px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-top: 1px solid #000;
  border-bottom: 1px solid #000;
  user-select: none;
  img {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background-color: #fff;
    margin-right: 15px;
    object-fit: cover;
  }
  span {
    color: white;
    font-size: 12px;
  }
}

// 侧边栏菜单的样式
.el-aside {
  .el-submenu,
  .el-menu-item {
    width: 200px;
    user-select: none;
  }
}
</style>
